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https://issues.apache.org/jira/browse/TINKERPOP-2817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17623126#comment-17623126
]
ASF GitHub Bot commented on TINKERPOP-2817:
-------------------------------------------
spmallette commented on PR #1835:
URL: https://github.com/apache/tinkerpop/pull/1835#issuecomment-1288905211
Aside from a nit and CHANGELOG entry this looks good - the committer can
handle both on merge if necessary: VOTE +1
> "Could not find a type identifier for the class : class java.lang.Byte"
> occurs when dumping graph to graphson format
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: TINKERPOP-2817
> URL: https://issues.apache.org/jira/browse/TINKERPOP-2817
> Project: TinkerPop
> Issue Type: Bug
> Components: hadoop
> Affects Versions: 3.4.6
> Reporter: Redriver
> Priority: Major
>
> When I used hadoop-gremlin 3.4.6 to export a graph to HDFS, I encountered an
> error.
> My gremlin query looks like:
> {code:java}
> graph = GraphFactory.open('conf/fdb-psave-export.properties')
> graph.compute(SparkGraphComputer).program(CloneVertexProgram.build().create()).submit().get()
> {code}
> {code:java}
> org.apache.tinkerpop.shaded.jackson.databind.JsonMappingException: Could not
> find a type identifier for the class : class java.lang.Byte. Make sure the
> value to serialize has a type identifier registered for its class.
> at
> org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider._wrapAsIOE(DefaultSerializerProvider.java:509)
> ~[gremlin-shaded-3.4.6.jar:3.4.6]
> at
> org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:482)
> ~[gremlin-shaded-3.4.6.jar:3.4.6]
> at
> org.apache.tinkerpop.shaded.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319)
> ~[gremlin-shaded-3.4.6.jar:3.4.6]
> at
> org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:3906)
> ~[gremlin-shaded-3.4.6.jar:3.4.6]
> at
> org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper.writeValue(ObjectMapper.java:3177)
> ~[gremlin-shaded-3.4.6.jar:3.4.6]
> at
> org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONWriter.writeVertex(GraphSONWriter.java:82)
> ~[gremlin-core-3.4.6.jar:3.4.6]
> at
> org.apache.tinkerpop.gremlin.hadoop.structure.io.graphson.GraphSONRecordWriter.write(GraphSONRecordWriter.java:72)
> ~[hadoop-gremlin-3.4.6.jar:3.4.6]
> at
> org.apache.tinkerpop.gremlin.hadoop.structure.io.graphson.GraphSONRecordWriter.write(GraphSONRecordWriter.java:42)
> ~[hadoop-gremlin-3.4.6.jar:3.4.6]
> at
> org.apache.spark.internal.io.HadoopMapReduceWriteConfigUtil.write(SparkHadoopWriter.scala:356)
> ~[spark-core_2.11-2.4.0.jar:2.4.0]
> at
> org.apache.spark.internal.io.SparkHadoopWriter$$anonfun$4.apply(SparkHadoopWriter.scala:130)
> ~[spark-core_2.11-2.4.0.jar:2.4.0]
> at
> org.apache.spark.internal.io.SparkHadoopWriter$$anonfun$4.apply(SparkHadoopWriter.scala:127)
> ~[spark-core_2.11-2.4.0.jar:2.4.0]
> at
> org.apache.spark.util.Utils$.tryWithSafeFinallyAndFailureCallbacks(Utils.scala:1394)
> [spark-core_2.11-2.4.0.jar:2.4.0]
> at
> org.apache.spark.internal.io.SparkHadoopWriter$.org$apache$spark$internal$io$SparkHadoopWriter$$executeTask(SparkHadoopWriter.scala:139)
> [spark-core_2.11-2.4.0.jar:2.4.0]
> at
> org.apache.spark.internal.io.SparkHadoopWriter$$anonfun$3.apply(SparkHadoopWriter.scala:83)
> [spark-core_2.11-2.4.0.jar:2.4.0]
> at
> org.apache.spark.internal.io.SparkHadoopWriter$$anonfun$3.apply(SparkHadoopWriter.scala:78)
> [spark-core_2.11-2.4.0.jar:2.4.0]
> at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:90)
> [spark-core_2.11-2.4.0.jar:2.4.0]
> at org.apache.spark.scheduler.Task.run(Task.scala:121)
> [spark-core_2.11-2.4.0.jar:2.4.0]
> at
> org.apache.spark.executor.Executor$TaskRunner$$anonfun$10.apply(Executor.scala:416)
> [spark-core_2.11-2.4.0.jar:2.4.0]
> at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1360)
> [spark-core_2.11-2.4.0.jar:2.4.0]
> at
> org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:422)
> [spark-core_2.11-2.4.0.jar:2.4.0]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> [na:1.8.0_202]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> [na:1.8.0_202]
> at java.lang.Thread.run(Thread.java:748) [na:1.8.0_202]
> {code}
> It looks like the default GraphSONRecordWriter/GraphSONRecordReader does not
> support the serialization/deserialization of java.lang.Byte. But according to
> https://tinkerpop.apache.org/docs/3.4.6/dev/io/#_extended_2, adding the
> custom module GraphSONXModuleV2d0/GraphSONXModuleV3d0 can fix this. The
> experient with a quick fix proves the fix is working.
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